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Zbrush messing up when re-importing Geometry

ZBrush Usage Questions
#1

Hi

lemme first explain what im spicificly doing with a simple geometry.

I use a standard Polygon Torus mesh from Maya modeling tools. I create it in Maya, and export it as a OBJ file to Zbrush.


In Zbrush i import the ring and subdivides it to lvl 4. I perhaps want to go back and make some basic adjustments to the original shape of the ring. So i take the subdivisions from 4 to lvl 1, then export it back to Maya. In maya I import the subdivision 1 ring, and start moving some random vertex up and down. I then export this ring again.

Ok so now im in Zbrush i still have my subdivision 4 ring in edit mode, i then want to import the changes from the lvl 1 ring to this lvl 4 ring. So in order to do this, i need to have my subdivision 4 ring turned down to lvl 1, and then import the changed lvl 1 ring.

The import goes fine, but when I turn the divisions back up in lvl, Zbrush either crashes or makes a total mess out of the geometry.

So what am i doing wrong. Are there any specific settings with the OBJ format i need to beware of for this to work or?

For any convience, im using a
Centrino dual 2.0 Laptop
1gb ram
Nvidia Geforce Go 7600
windows xp SP2
along with Maya 8 and Zbrush 2.0

#2

I know it should actually be able to work this way, as i’ve seen Zack Petroc demonstrate it in his Digital Sculpting: Human anatomy dvd.

The problem do not occur when I use the following method…

Instead of exporting the subdivided lvl 4 ring as subdivided lvl 1 ring, in an attempt to try and make the changes on that in Maya. I instead open the original torus I made in Maya, and make the changes to that, I Then export it to Zbrush where it allowes me to re-import it to the subdivided lvl 4 mesh without any problems.

Although i would really be interested in getting the first method working.¨

Any help would be much apreciated.

#3

In Maya’s import settings you need to set Create Multiple Objects to False. Otherwise, Maya changes the point order when you import the model, which then causes the model to blow up back in ZBrush.

There’s an FAQ section here at ZBC which contains information specific to Maya. This is covered in the tutorials. :slight_smile:

#4

You just became my hero Aurick, thanks a bunch, and for next time I will look more closely in the FAQ

YES!!